Hoisting apparatus.



PATENTED UGT. 23, 1906.

C. HUNT..

G APPARATUS.

APPLIOATOEI FILED PEB. 7, 1906.

2 MEETS-SHEET 1.

W. HUNT. HUNTING APPARATUS.

APPLICATION FILED PEB. 7, 1906.

f no.. senses.

specification of Letters Patent.

Patented Get. 23, 1906.

Application tiled February 7I 190B. Serial No. 299.875.

'.ifo @ZZ/:whom zit may concern:

'Be it known that I CHARLES lVALLi/ion UNT, a citizen oi' the United btates, and a Y. resident of iNest New Brighton, in the bor-` o iigh of Richmond., city oi New York, in the State olf New York, have invented certain new and useful improvements in. Hoisting Apparatus, oi' which the following is especification, reference being had to the accom- .1.oypanying drawings, forming a part hereof.

in hoisting apparatus such as that which is commonly used i'or discharging coal and otherlilre purposes, and comprises two hoisting-drums and ropes connected. to the shovel or scoop, the cooperation oli such drums and ropes being necessary to control the opening and closing oi' the shovel or scoop well as to eiiect the raising and lowering, it is usual to provide clutches and brakes 'for both zo drums `for the purpose oi enabling the windin? in and. paying out of one or both ropes to be regulated according to the operation to be performed, it being necessary when lowering the load and when opening or closing the sho vel to disconnect one or. the other, or both, oi the drums troni the drivingl mechanism and. to control the backward rotation by brakes. The mechanism usually employed Jfor the 'purpose requires the operationby the 3o attendant of three or more toot or handlevers, and therefore places an excessive tax upon the powers oi" the operator.

lt the object of this invention to coinbine with the drums and ropes and the sho vel or scoop to be raised or lowered and. opened or closed thereby means for operating and controlling the movement of the drums which shall. require only two operating-handles for the attention of the operator, such means comprising two independent reversible niotors separately coi'in'ctedv to the respective drums and provided with electrically-controlled brakes and separate controllers therefor, whereby each drum at will can be driven ahead, can be relieved of the driving irnpulsc, and can be subjected/to a braking action proportionate to the requirements, and can receive a reverse driving impulse when neces.

hereinafter with reference to 'the accompanyi ing drawings, in which it is illustrated, and in hoisting apparatus constructed and arranged in accordance with the invention. Fig. 2 is a iv. rl'ho invention `will he Amore fully explained' partial plan view thereof somewhat diagrammatic in its nature, andFig. 3 is a detail view of the brake applied to the motor.

in the embodiment of the invention represented in the drawings the two hoistingdrums a. and t, oi ordinary construction and 'mounted 'for rotation, as usual, are respectively connected by ropes c and d, which pass over suitably-placed guide-pulleys e .and f 'with vthe scoop or shovel. g, the rope c being connected to the Jframe 7L of the shovel, while the rope d is connected to the drum "i, the shalt /c of which is operatively connected, through. a rope or chain Z and levers 'm and n, with the two parts g and gZ oi' the scoop to effect the opening and closing of the shovel or scoop in the fusual manner. It will be understood thattension upon the rope or chain d closes and holds closed the scoop or shovel and that when the tension is relaxed the scoop or shovel will open. ln raising and in lowering the load it is therefore necessary to maintain relative tension upon the rope or chain d as compared with the rope or chain c or to relax the same, according to the operation to be accomplished-that is, whether the bucket is to be opened or closed.. T he lowering of the load is effected by gravity, and at such times the speed of descent of the load is controlled by a braking action upon one or both oi the motors. W hen the load is to he discharged from' the shovel, the rotation oi the drum a must bestopped and the drum 'b must' be iree to rotate in order that the shovel may open, the drum a being held by the braiding action while the drum t is released frorng the driving impulse. In closing the shovel the drum l) is first rotated. to put tension on lthe rope or chain d, while the drum a is released from the driving impulse in order that the rope or chain c may be slack. In hoisting the load may be carried by the drum b alone, the drum a rotating to take up the slack of the rope or chain c, or the load may be carried by both drums. lt is therefore necessary, as is well understood, to

make each drum controllable independently of the other and toprovide for rotating one drum slightly behind the other or both drums together and for applying a braking action to either drum independently of the other.

'To accomplish the purposes just referred to, there are provided in accordance with this invention two independent reversible motors o and p, each being connected independently of the other with. the eei'fespenciing drinn, I

Lin'eugh a shaft 1' mici suiiebie s To euch motel' is eppiieifi e inaii'e z5j preiffa/iegly ef the characterindicated i 3 of the di i gs, in which e Weighted iufm @pei-(ita s i emily .to eppiy the bleke, sind the :ic/tien of the Weighted :nini opz'peseii by a. solenoid i2. which is eiectricziliy connected with. the mi 'bei' end centi'eilei in 'sie inem ci fully esc'ihed in Letters Patent' the United Sin-ies No, /'Gj-ii date: ./piii 4L, 1005. Beth motors muy be drive' iTom commen suppiylq (indieetcai by the iin es 'u 'L1/j) but euch motor with its brake is s ninziteiy coitr'e'lied i by its own cm'itreicl' ze 11V, which is anni' i es escibed in seid Leilnei 865323, izo drive the nicher eiieed oi' i ,ickn wsd wi th Varying eiui'cn i', ci te cui eli cui'i'en u altogether and te regulate @he schien of' he brake, ecceiiiing ce he conditions under which the motel' is op ed. It will 'ee misood the@ when die ino/imi is feveiscd. wugh the opei'eien uit ihe ceniwieiie'i.' "i, M1 sets te Oveiimiii il .Y mpc :ind ihm, ile b le @peintes "ne susi/em mii", the ined te descend A tien ei the pai-minis wil be reed :their @xph-nation.. l nsnipiiiebien ci the two centmlienhm EL xviii be 1"' dies it is possibi-f P che e, i the @maintes precisely f be desn'zine 'luider 'bile given. eend itiens, 1

ses

Lrenbe.

l Glenn as my invention"c l. A hoisting :ippsi'etus comprising two :independent hoisfing-di'ums, an automatic 4o l, co neetiens from 'one of seid drums @o une ci' the shovel, connections from the ethei ef' seid drums te the nioving'peits of the shove! te open and close the seine, indewndemy nieuwe for seid 'ieisting-drunls 45 respectively? independent electiicaliycontreiefi binnes' ei seid meters respectively, :ind independent; cenii'i'eiieis fer seid motors and. brakes respecte v.

pendent hei n e kruins, i 1-L`evei liu-ving L frame and. Inevfnle inenxiu to open and close and ineens "Le operaie seid, members, connections 'ein one of seid drums te the keine of the shovel, connections from the 55 other of sind drums te the operating ineens im' the members e the shovel, independeni; Le'ioboi's fel' seid drums respeciiveiy, 5.1"; dependent electriciiiijfwentmied brakes foi' sind niotei's respectively and independent 6o cemvelicfs foi-smid meters and mekes iespec- HUNT.

e1* mechanical bi'eles te i'equii'e his '35 i miaei'itiimsnd *Le beceme possible seiireesof 

